Bearing and method of making it



Aug. 24,1926. 1,597,429

,1. BRINCIL BEARING AND METHOD OF MAKING IT Filed July 2, 1925 mmmmmxmmmmm@ \\x\\x\mx\x\\\\\\\\\\\ MMMMMMWMMMM.

M ATTORNEYS Patented UNITED STATES JOSEPH BnINomoF PLAiN-FrELD; NEW JERSEY.-

BEAnrNe'nND METrronor .MAKING 1r. y

Application' leaduiya 1'925Q- seriai No. 41,007,-

This invention relatesl to ,bearings and their manufacture, `particularly to bearings of. the.selflubricating type.. Itis old in making bearings lof this type to provide the metal face-ot' the-bearing With inserts of graphite or other solid lubricant but it is i difficult to inake these inserts stay in place.

It yhas been proposed tostamp depressions in the face of a strip of bearing metal, lill *thesev depressions with graphite and then roll the strip into cylindrical form. vThis Vtype of .bearing is relatively inexpensive to make, but is not Wholly satisfactory in use due to the fact that the graphite inserts are likely to be Adisplaced owing to the fact that the depressions cannot be made to lock them in place. It has also been proposed to make self-lubricating bearings having dove-tailed, and hence locking grooves, by extruding metalv Athrough an annular die shaped to provide'undercut 'grooves in the inner face of the tube, these grooves being subsequenttory-not only Vbecause thegraphite inserts' are likely to' fall out,- but because the two` cylindrical members ofthe bearing are likely'tobecome'separated unless they are permanently joined in some manner.

`c'cording to the present invention I have provided Jan inexpensive method of making av self-lubricating bearing-Which shall be free from the objections-noted above and which may have as its lubricating element either graphite or other'lubricating paste. In carrying out my' invention I take a strip of.` bearing metal suchas brass or bronze and perforate a section Aofit with a series of perforations and then fold the perforated and unperforated sections together to form a multi-ply strip. If graphite is to be used as a lubricant the perforations are then filled with lgraphiteandthe strip rolled and*l baked. It is then Wound about an arbor, cut to the proper length and swaged to form a truelcyiindrical bushing bearing.

lustrated certain' prerredy embodiments .of my'lnvention.' In these drawings Fi'gure'l.

"is a plan view'of al strip lot bearing metal the edges of which have been provided With a series ot' perforations; Figure 2 is a plan 'view of the strip shown in'Figmre 1' with 'the perforated edges folded over upon the unperforated mid-section; Figure 3 is a sect tion taken along line. 3-,3 of Figure 24 after'the perforations have been filled With graphite; Figure. .4 is a section taken along line 4-4 of Figure 5 showingl a completed bushing bearing made byI bending the strip of Figure 2 about an arbor in the direction of its length; Figure 5 is a side view of the bushing bearing shown in Figure 4; Figure 6 is a section taken along line (3*6 of Figure 7 showing a bushing bearing made from the strip of Figure 2 bent about an arbor transversely, ,this bearing as illustrated being on a larger scale than the'bearing of Figure 4; Figure 7 is a side view of vthe `bearing shown in Figure 6; Figure 8 is a plan vievvof a strip of bearing metal onehalf of- Which'has been provided With a series of perforations; Figurel 9 illustrates a still further modified form of perforated strip, the perforations in this case extending down the center of the strip leaving the edges unperforated, and Figure 1,0 is a plan View of the'strip shovyn' in Figure A9 Withthe unperforated edges folded over upon the perforated mid-section.

As illustrated in these drawings ,-1. reprel sentis a strip of bearing metal either of brass 'or bronze or other suitable material. In the form shown 'in Figure l this stripv is provided along its edges With a series vof oblique perforations 2 provided as illustrated with Certain of these perforations may extendA through to the very edges of the strip as illustrated atv 3. The perforated-edges of 4flaring side Walls `formed by passing the the strip 1 are then folded inwardly along the dot and dash line illustrated in Figure 1 until Vthey meet along a line 4 as illustrated in Figure 2. The folding is doneA in such a manner thatin the two-ply structure -illustrated in Figure2 the large ends of the pero iorations are innermost and adjacent the In the accompanying drawings Ihave il` unperforatedmid-section ofthe strip,"'thus j forming a series Aof pockets having over.` hanglng walls which act as reta-ming means-- for the lubricant. The lubricant, preferably thestrip beneath a hopperwhich forces it into' the perforations as the strip passes.

The' strip with its lubricating insert is then i izo ing bearing of t :preferably baked and rolled to compress or ypack the' graphitel within the perforations:

If the'bear'lng is to be used as aflat sur- 'face tfis complete-in the Iform illustrated' in Figure 2 with the lubricanttin'serted. For most purposes, however, I desire to form the strip of Figure 2 into a cylindricabbushing,

I do this by winding' the strip about ana'rbor, not shown, with the per'forationsin- `nermost, cutting off the strip to the necessary length, lacing the unfinished bushing upon a secon"- arbor of exactly the proper diam.- eter and swagin it-thereon to form a bushe proper dimensions. l l

As-illustrated in Figures 4 and 5 the strip in Figure 2 h as been wound about the arbors longitudinally, that iswith the'longitudinal axis of the strip. placed circumferentially -of the arbors.' In that event the line 4 forms acircle interiorly of the bushing while the two abutting ends contactlalong line 5 which `forms an elementof the completed cylinder. ThiS bushing, itv will be noted, iS of a length equal to the width ofthe folded strip,-and

furthermore the annular edges 'of the bushing are enclosed, beingformedby the overturned parts of the strip 1.'l When such a bushing vis employed '-in connection. with a rotating shaft 'it will be noted that that section-of the bearing adjacent the line 4 would remain 'unlubricated Awere it not for the extensions 3 on some of the perforations 2.

The 'strip shownin Figure 2 may also. bev

wound transversely as illustratedinFigures 61nd 7, in which caseA linel 4 becomes one of the elements ofthe cylinder and the abutting edges-along the line 5, are the enclosed edges of the strip. In this case the circumference and not the length of the nished bushing is determined bythe width of the folded strip.

After the strip is wound the bushings them# selves are cut transversely from the rolled strip. In this case therefore both endsofthe bushing arel openand the line of contact' between the two plys clearly visible.

In -Figure 8, I have illustrated a modified -form of perforated-strip in which halfa of the strip is perforated longitudinally and is intended to be folded overl upon the unperforated half. In this case therefore there is but one enclosed edge and noline 4.

In .Figures 9 and 10, I have illustrated a still further modified method of forming a bearing. In this case the strip is perforated down its ymid-section leaving the edges unperforated. This strip is, in eiect, the cornplement of the strip shown in Figure 1 and the resultant bearings are the same, except that the line of contact 4 between the folded edgesl lies exteriorly of .the` bearing instead v 'ofinte'riorly a graphite paste, is then inserted by passing 1'. The method offmakinga self-lubricated :ing bearing which comprises formingvper forations in astri'p -oifbearing metal-leaving part of the st ripunperforated, foldingthe perforated and un 'erfor'ated-parts together *and filling the per orations V with a lubricatmg material. f

forations having flaring side walls ina strip of bearing meta-'l'. leaving part ofthe strip unperforated, foldingthe perforated and 2. 'Ifliemethodofmakiiigi-'a self'- lubricat-l'k ingbearing which comprises'forming per-` unperforated parts together with the large end of the perforations adjacent the unper forated metal, and filling the perforations with a. lubricating material.

3. The method of making a self-lubricati ingbushing bearing which comprises form-1v ing perforations in a strip of bearing 'metal' leaving part of the strip unperforated, folding the perforated and unperforated parte together, filling the perforatons with a luy brlcating material and bending the strip cylindrical form..

4. The method ofmaking'a self-'lubricat-` ing'bushing bearing which comprise'sformf ing a. series of perforations longitudinally of a strip of bearing metal leaving a longitudinal part ofthe strip unperforated, folding the. perforated and unperforated parts 4ftoge'ther, filling the perforations with a lubricating material, and bending the strip into cylindrical form 'with thesperforations innermost." e

' 5.l The method of making a'self-lubricatf ing bushing bearing which comprises :punching a seriesof perforations along the edges of a strip of bearing metal leaving the center of the strip unperforated," folding the perforatedjparts until they meet, filling the perforationsjwith a lubricating material'and bending the strip into cylindrical form with the perforations innermost.

' 6. A self-lubricating Vbearing comprising a strip of' bearing metal having one part perforated and another unperforated, the perforated and unperforatedparts being folded i together,`and alubricating material in the one part al, and a lubricating materialv in the perforations.-

8.` A self-lubricating bushing bearing com prislng a strip of bearing metal having one part perforated and another unperforated, i30- the perforated and unperforated parts being folded together and the two-ply structure rolled into cylindrical form with the perforations innermost, and a lubricating ma- 5 terial in thevperforations.

9. A self-lubricating bushing bearing, comprising multiple plies of a single strip of bearingmetal, having one part perforated and another part unperforated, the rforatedand unperforated'pwrts being fo ded together, and the multiple ply structure rolled into cylindrical form with the perforations innermost, and a lubricating material in the perforations.

In testimony whereof I aiix my signature.

JOSEPH BRINCIL. 

